Hydrothermostatic valve control



Dec. 9, 1930. LAWLER I HYDRO THERMOSTATIC VALVE CONTROL Filed Jan. 31,1929 I 4 INVENTOR. (hr/zed JLaa/Zen closed by thescrew plug 4. tube 5 m-Patented 9, 1930 iUNIT-ED STATES JAMES J. nawnnn, or norms: 7253311011,Nnw ron1t HYDBOTHEIBMOSTATIG VALVE CONTROL.

Application filed January 31, 1929. Serial No. 886,554.

This invention relates to certain new and useful improvements inhydrothermostatic valve control of the type comprising an expansibletube or bellows containing a fluid and is designed for controlling theoperation of valves in various devices, such as in connectionwithheating systems.

The primary object of the invention is to provide a hydrothermostaticvalve control comprising an expansible tube or bellows that. houses acore or plunger fixed to one end thereof to reduce the expansible fluidcontaining area of the bellows and to render the corrugated edge of thebellows more sensitive to elongation upon expansion of the fluidcontained therein. 7

A further object of the invention is to provide a hydrothermostaticvalve of the above type wherein the filling core of the bellows islongitudinally grooved to permit the escape of all air from the bellowsduring charging thereof with the fluid.

With the above and other objects in view that will become apparent asthe nature of the invention is better understood, the same consists inthe novel form, combination and arrangement of parts hereinafter morefully described, shown in the accompanying drawing and claimed.

In the drawing Figure 1.is a vertical sectional view of ahydrothermostaticvalve control constructed in accordance with thepresent invention, showing a part of the thermostatic element of thecontrol remotely positioned with respect to thevalve operating mechanismI Figure 2 is an enlarged horizontal sectiogal view taken on line 2-2 ofFigure 1; an

' Figure 3 is an expanded side elevational viewof the expansible tube orbellows with the core insert, and attaching screw and washer.

The hydrothermostatic control valve is illustrated as comprising a'cylinder 1 open at its upper end and having a lower section 2 ofreduced diameter defining an intermediate annular shoulder 3, the lowerend of the reducer lower section 2 of'the cylinder be'ng appear.

municatesv with the lower end of the cylinder section 2 which, at apoint remote from the cylinder is provided with a plurality of loops 5apositioned for thermostatically controlling the operation of a valve.

The cylinder section 1 contains an expansible tube 6 of bellowsformation, the lower end of the tube 6 being spot welded or otherwisesecured to the shoulder 3at the point 7 with the upper end of the tube 6terminating inwardly of the'upper end of the cylinder section 1. Acylindrical core 8 is anchored at its upper end to the upper end of theexpansible tube 7, the upper end of'the cylindrical core 8 having afitted socket 9 to receive the screw studs 10 passed through the upperend of the expansible, tube 6, a washer 11 being interposed between theupper end of the tube 6 and the cylindrical core 8. The core 8 islongitudinally grooved as at 12 upon one side thereof for purposespresently to A cylindrical block 13. is freely mounted in the upper endof the cylinder section 1 and has its lower face fashioned to receivethe upper end of the expansible tube and the retaining screw 10 in thecore 8 as shownin Figure 1.

A bracket arm 14 projects upwardly from the upper edge of the cylindersection 1 and formsa pivot-bearing 15 for the lever 16 that is weightedas at 17 to control movement of the valve 18in the cylinder 19, thelever 16 having. a link connection 20 with'the valve 18 at the endthereof opposite the adjustable weight 17. The link 21 carried by theweighted end of the lever 16 above the c linder section 1 is attached tothe follower able in the cylinder section 1 that engages the block 13. ip A fluid F occupies the entire area within the expansible tube 6,cylinder section 2 and pipe 5 with the looped section 5a an said uid maybe introduced into the valve control device by removing the cap end 5bfrom the terminal loop end 5a, orby removduced into the control-device,it being understood that the cylinder-sections 1 and 2- are "in aninverted position, the'fluid enters the slid- I the restricts expansibletube 6 by way of the longitudinal si e groove 12 in the cyhndricalcore 8which is to lpermit the escape of air from the expansi le tube so thatfluid only occupies the entire area within the control device. The fluidF is ex anded by heat and in view of uantitfi withinthe expansible tubeoccasions by t e cylindrical core insert, such restricted quantity offluid becomes highly sensitive to heat changes to effect an immediateand increased expansion and contraction of the expansible tube, theexpansive movement of t etube bein increased also by the body of fluidin the ower clylinder section2impinlgindgor ressing'u' on t e lowerendof the in ric core 8. he valve 18 is illustrate in its closedposition in the c linder 19 within which the valve seats an uponcontraction of the fluid, the

.sired location, such as in rooms or draft passa es, for thethermostatic control of the 'va vs 18 and" the operation of said valveis rendered highly sensitive or quick acting in view of-the relativelysmall uantity of volatile-fluid within the expansi 1e tube 6 resultingfrom the core insert 8. The lower end of the cylindrical core 8 dependsinto the upper end of the lower 0 linder section 2 and is guided at itslower on in its sliding movement, the upper end of the core 8 beingseated in the lower face of the block 13.

Fromthe above detailed description, it is believed that the constructionan operation will at once be ap arent, and while there is herein shownand escribed the preferred embodiment of the resent invention, it isnevertheless to be un erstood that minor changes may be made thereinwithout .de artin from the spirit and scope of the invention as claimed.

I claim: .7 1. In a hydrothermostatic valve control, a casing, anexpansible tube in the casing closed at its upper end with the loweropen end socured to the side wall of the casing, between the up ifr andlower ends of the one forming a c amber between the upperen of the tu eand thelower end ofthe casing, a thermostatic tube communicatin with thelower end of the casing with a fluid the chamher and tube, and acore'insert in e expansible tube occup g the major interior area thereofto rend ei; the fluid more responsive to temperature variations and saidcore depending below the lower end of the ex ansile tube to be impin edby the body 0 fluid in the lower end of e chamber.

. 2. In a hydrothermostatic valve control, an

expansible tube containing a fluid and acore' insert in the tubeoccupying the major in-',

3. In a hydrothermostatic valve control, a casing, an expansible tube inthe casing closed at its upper end with the lower open end secured tothe side wall of the casing, between the upper end of the tube and thelower end of the casing,-a thermostatic tube communicating with thelower end of the casing with a fluid filling the chamber and tube, acore insert in the expansible tube occupying the major interior areathereof to render the fluid more responsive to temperature variationsandsaid core depending below the lower end of the expansible tube to'beimpinged b the body of fluid in the lower end of the c amber, and saidcore having a longitudinal surface groove therein ermitting the escapeof air from the expansi le tube when charging the same with the fluid.

4. In a hydrothermostatic valve control, an expansible tube containing afluid and a core insert in the tube occupying the major interior areathereof to render the fluid more vresponsive to vtemperature variations,the

terior of the expansible part and a core insert carried by theexpansible part of the holder. v

6. Thermostatic apparatus comprising a fluid holder having a rigid'partand an expansible part and containing a fluid, the ri id part bein incommunication with the 1nterior-of t e expansible part, and a coreinsert carried by the expansible part of the. holder and extending intothe rigid part.

. 7. Thermostatic apparatus comprising a fluid holder having a rigidpart andan expansible part and containing a fluid, the rigid part beinin communication with the interior of t e expansible part, and a coreinsert carried by the expansible part of the holder, and extending intothe rigid part and 5 occupying the major ,portion of the interior '1 Intestimony whereof I aflix my signature. i

JAMES J. LAWLER.

